Boiler material returning device

Abstract

The utility model provides a boiler material returning device. The boiler material returning device comprises a material receiving pipe, a material returning bin, a material returning pipe, an air inlet bin and an air cap. According to the boiler material returning device, the material receiving pipe is installed below the separator, the material returning bin is installed at the bottom end of the material receiving pipe, the air inlets are formed in the bottom and the side face of the material returning bin, and the material returning pipe is obliquely arranged on the side, opposite to the air inlets in the side face, of the material returning bin. An air inlet bin is detachably installed at the air inlet, a plurality of air caps are installed on one side of the air inlet bin, and the air caps are detachably installed on the side wall of the air inlet bin. In the later maintenance or overhaul process, the air inlet bin can be detached from the material returning bin and independently moved to a detection or maintenance site for overhaul, and a plurality of air caps located on the same air inlet bin can be overhauled at the same time. The operation is convenient, the labor intensity is reduced, and the blast cap is convenient to overhaul and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of circulating fluidized bed boilers, and in particular relates to a boiler material returning device. Background Art

[0002] The boiler return device is used to stably return the solid materials separated by the separator to the combustion chamber with higher pressure, and to ensure that the amount of gas backflowing into the separator is minimized. A hood is usually installed inside the return device, which is installed inside the return bin and connected to the return bin. The material separated by the separator is fluidized by the air intake of the hood, and is transported to the combustion chamber under the action of wind pressure. The hood is prone to blockage or wear during use, and needs to be regularly inspected, maintained and replaced during use. In the prior art, the hood is located inside the wind chamber, which is convenient for disassembly and installation during disassembly and maintenance, but inconvenient for disassembly, assembly and maintenance of the hood. Utility Model Content

[0003] The embodiment of the utility model provides a boiler return device, aiming to solve the problem in the prior art that the internal hood of the boiler return device is inconvenient to inspect, repair, maintain and replace.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a boiler material return device, comprising:

[0005] A material receiving pipe is arranged in a vertical direction, and the top end of the material receiving pipe is connected with the separator;

[0006] A material return bin is installed at the bottom end of the material receiving pipe and is communicated with the material receiving pipe;

[0007] A return pipe is connected to one side of the return bin, and the return pipe is gradually inclined downward in a direction away from the return bin;

[0008] The bottom of the return bin and the side of the return bin away from the return pipe are both provided with air inlets;

[0009] The air inlet bin is covered at the air inlet and is detachably mounted on the return bin. A plurality of wind hoods are mounted on one side of the air inlet bin close to the return bin. When the air inlet bin is mounted on the return bin, the wind hoods are located inside the return bin.

[0010] In a possible implementation, a first flange is protrudingly provided on the inner wall of the air inlet on the return bin, and a second flange detachably connected to the first flange is protrudingly provided on the outer wall of the air inlet bin.

[0011] In a possible implementation manner, a threaded sleeve is fixedly installed on a side of the first flange away from the second flange, and a fastener for fixing the first flange to the second flange is threadedly connected to the threaded sleeve.

[0012] In a possible implementation manner, a protective sleeve is sleeved on the outer side of the threaded sleeve, and the protective sleeve is fixedly mounted on the first flange.

[0013] In a possible implementation, a guide hole that is slidably matched with the outer wall of the air inlet bin is provided on the first flange, and a guide portion that extends toward the interior of the return bin is provided on the inner wall of the guide hole.

[0014] In a possible implementation, a concave cavity for accommodating the second flange is formed on the outer side wall of the return bin, and when the air inlet bin is installed on the return bin, the second flange is located inside the concave cavity.

[0015] In a possible implementation, a material guide plate is installed above the air inlet on one side of the return bin, and the material guide plate is inclined from top to bottom toward the interior of the return bin.

[0016] In one possible implementation, the air inlet bin is connected to an air inlet pipe, the air inlet pipe is located on a side of the air inlet bin away from the wind hood, and an elbow is installed at the end of the air inlet pipe. When the air inlet bin is installed on the return bin, the port of the elbow is set toward the return bin.

[0017] Compared with the prior art, the solution shown in the embodiment of the present application is that a material receiving pipe is installed below the separator, a return bin is installed at the bottom end of the material receiving pipe, air inlets are provided at the bottom and side of the return bin, and a return pipe is obliquely provided on the side of the return bin opposite to the side air inlet, and the lower end of the return pipe is used to connect to the combustion chamber. An air inlet bin is detachably installed at the air inlet, and multiple wind hoods are installed on one side of the air inlet bin, and the wind hoods are detachably installed on the side wall of the air inlet bin. During later maintenance or overhaul, the air inlet bin can be removed from the return bin and moved separately to the inspection or repair site for overhaul, and multiple wind hoods located on the same air inlet bin can be overhauled at the same time. It is easy to operate, reduces labor intensity, and facilitates the overhaul and maintenance of the wind hoods. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a boiler material return device provided in an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the installation structure of the air inlet bin provided in an embodiment of the utility model;

[0020] Figure 3 for Figure 2 A partial enlarged view of part A in the middle.

[0021] Description of reference numerals:

[0022] 1. Material receiving pipe; 11. First flange; 111. Guide part; 12. Material guide plate; 2. Return material bin; 3. Return material pipe; 4. Air inlet bin; 41. Second flange; 5. Air hood; 6. Threaded sleeve; 61. Protective sleeve; 7. Fastener; 8. Elbow. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] Please also read Figures 1 to 3 , the boiler return device provided by the utility model is now described. The boiler return device includes a receiving pipe 1, a return bin 2, a return pipe 3, an air inlet bin 4 and a hood 5 installed on the same side of the air inlet bin 4. The receiving pipe 1 is arranged in a vertical direction, and the top of the receiving pipe 1 is connected to the separator; the return bin 2 is installed at the bottom end of the receiving pipe 1 and is connected to the receiving pipe 1; the return pipe 3 is connected to one side of the return bin 2, and the return pipe 3 is gradually inclined downward in the direction away from the return bin 2; the bottom of the return bin 2 and the side of the return bin 2 away from the return pipe 3 are both provided with air inlets; the air inlet bin 4 cover is arranged at the air inlet, and can be detachably installed on the return bin 2, and a plurality of hoods 5 are installed on the side of the air inlet bin 4 close to the return bin 2, and when the air inlet bin 4 is installed on the return bin 2, the hood 5 is located inside the return bin 2.

[0025] Compared with the prior art, the boiler return device provided in this embodiment has a material receiving pipe 1 installed below the separator, a return bin 2 installed at the bottom end of the material receiving pipe 1, air inlets are provided at the bottom and side of the return bin 2, and a return pipe 3 is obliquely provided on the side of the return bin 2 opposite to the side air inlet. An air inlet bin 4 is detachably installed at the air inlet, and a plurality of wind hoods 5 are installed on one side of the air inlet bin 4. The wind hoods 5 are detachably installed on the side wall of the air inlet bin 4. During later maintenance or overhaul, the air inlet bin 4 can be disassembled from the return bin 2 and moved separately to the inspection or repair site for overhaul, and a plurality of wind hoods 5 located on the same air inlet bin 4 can be overhauled at the same time. The operation is convenient, the labor intensity is reduced, and the overhaul and maintenance of the wind hoods 5 are convenient.

[0026] Specifically, in the present embodiment, a plurality of wind hoods 5 are installed on a side of the air inlet bin 4 close to the return bin 2 , and the plurality of wind hoods 5 are evenly spaced and installed on the side of the air inlet bin 4 .

[0027] In some embodiments, the return bin 2 may be used as follows: Figure 2 , Figure 3 See also Figure 2 , Figure 3 A first flange 11 is protruded on the inner wall of the air inlet of the return bin 2, and a second flange 41 detachably connected to the first flange 11 is protruded on the outer wall of the air inlet bin 4. When the air inlet bin 4 is installed on the return bin 2, the air inlet bin 4 is inserted into the interior of the first flange 11 and extends into the interior of the return bin 2, so that the hood 5 is located inside the return bin 2. At the same time, the second flange 41 and the first flange 11 are fitted together, and the first flange 11 and the second flange 41 are fixedly connected by bolts.

[0028] Specifically, in this embodiment, a channel for installing the first flange 11 is provided at the air inlet, and the first flange 11 is fixedly installed on the inner wall of the channel by welding. The second flange 41 is sleeved on the outer side of the air inlet bin 4 and fixedly installed on the air inlet bin 4 by welding.

[0029] In some embodiments, the first flange 11 may be formed as follows: Figure 2 , Figure 3 See also Figure 2 , Figure 3 A threaded sleeve 6 is fixedly installed on the side of the first flange 11 away from the second flange 41, and a fastener 7 for fixing the first flange 11 to the second flange 41 is threadedly connected on the threaded sleeve 6. The threaded sleeve 6 is a nut, and the fastener 7 is a bolt. The threaded sleeve 6 is fixedly installed on the side of the first flange 11 by welding. Through holes corresponding to the threaded sleeve 6 are provided on the first flange 11 and the second flange 41. Therefore, the second flange 41 can be fixed to the first flange 11 by tightening the fastener 7.

[0030] Specifically, in the present embodiment, there are multiple threaded sleeves 6 , which are evenly arranged on the first flange 11 and located around the air inlet bin 4 .

[0031] In some embodiments, the threaded sleeve 6 may be Figure 2 , Figure 3 See the structure shown. Figure 2 , Figure 3 The outer side of the threaded sleeve 6 is sleeved with a protective sleeve 61, which is fixedly mounted on the first flange 11. The protective sleeve 61 is a collar, which is sleeved on the outer side of the threaded sleeve 6, and one end of the protective sleeve 61 is fixedly mounted on the first flange 11 by welding, which can play a certain protective role on the threaded sleeve 6 and improve the service life of the threaded sleeve 6.

[0032] Preferably, in this embodiment, a cover plate for preventing materials from entering the protective sleeve 61 is fixedly installed at one end of the protective sleeve 61 away from the first flange 11, and the cover plate is sealed and connected to the end of the protective sleeve 61, thereby further protecting the threaded sleeve 6.

[0033] In some embodiments, the first flange 11 may be formed as follows: Figure 2 , Figure 3 See also Figure 2 , Figure 3 The first flange 11 is provided with a guide hole that is slidably matched with the outer wall of the air inlet bin 4, and the inner wall of the guide hole is provided with a guide portion 111 that extends toward the inside of the return bin 2. The provision of the guide hole can improve the stability of the installation of the air inlet bin 4. The provision of the guide portion 111 can lengthen the length of the guide hole. When installing the air inlet bin 4, the air inlet bin 4 can be pushed into the inside of the return bin 2 through the guidance of the guide hole, which is convenient for the disassembly and installation of the air inlet bin 4.

[0034] In some embodiments, the return bin 2 may be used as follows: Figure 2 See the structure shown. Figure 2 The outer wall of the return bin 2 is provided with a concave cavity for accommodating the second flange 41. When the air inlet bin 4 is installed on the return bin 2, the second flange 41 is located inside the concave cavity. When the outer wall of the return bin 2 slides into the guide hole, the second flange 41 slides into the concave cavity, which plays a protective role for the fastener 7.

[0035] In some embodiments, the return bin 2 may be used as follows: Figure 2 See the structure shown. Figure 2 A guide plate 12 is installed above the air inlet on one side of the return bin 2, and the guide plate 12 is tilted from top to bottom toward the inside of the return bin 2. The guide plate 12 is tilted on the inner wall of the return bin 2, and is an integral bending structure with the inner wall of the return bin 2. The guide plate 12 is located above the air inlet, and the setting of the guide plate 12 can prevent the material from accumulating on the guide part 111, so that the material can be fully transported to the inside of the combustion chamber. When the material falls on the guide plate 12, it can continue to slide down under the guidance of the guide plate 12.

[0036] In some embodiments, the air inlet bin 4 may be configured as follows: Figure 1 See the structure shown. Figure 1The air inlet bin 4 is connected to an air inlet pipe, which is located on the side of the air inlet bin 4 away from the wind cap 5, and an elbow 8 is installed at the end of the air inlet pipe. When the air inlet bin 4 is installed on the return bin 2, the port of the elbow 8 is set toward the return bin 2. The air inlet bin 4 is connected to an air inlet pipe, and the end of the air inlet pipe away from the air inlet bin 4 is connected to an elbow 8, which is composed of two air ducts and an elbow arranged in parallel at intervals. The elbow is located between the two air ducts. Through the setting of the elbow 8, when disassembling the air inlet bin 4, the installation and disassembly of the air inlet bin 4 can be completed by moving in the same direction. The air inlet bin 4 can be taken out from the inside of the return bin 2 by disassembling the second flange 41 and the elbow 8. It is convenient to operate and easy to remove the air inlet bin 4.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A boiler return device, characterized in that: include: A material receiving pipe (1) is arranged in a vertical direction, and the top end of the material receiving pipe (1) is connected to the separator; A material return bin (2) is installed at the bottom end of the material receiving pipe (1) and is in communication with the material receiving pipe (1); A return pipe (3) is connected to one side of the return bin (2), and the return pipe (3) is arranged to be gradually inclined downward in a direction away from the return bin (2); The bottom of the return material bin (2) and the side of the return material bin (2) away from the return material pipe (3) are both provided with air inlets; An air inlet bin (4) is covered at the air inlet and is detachably mounted on the return bin (2). A plurality of wind hoods (5) are mounted on a side of the air inlet bin (4) close to the return bin (2). When the air inlet bin (4) is mounted on the return bin (2), the wind hoods (5) are located inside the return bin.

2. The boiler material return device according to claim 1, characterized in that: A first flange (11) is protrudingly provided on the inner wall of the air inlet of the return bin (2), and a second flange (41) detachably connected to the first flange (11) is protrudingly provided on the outer wall of the air inlet bin (4).

3. The boiler material return device according to claim 2, characterized in that: A threaded sleeve (6) is fixedly mounted on a side of the first flange (11) away from the second flange (41), and a fastener (7) for fixing the first flange (11) to the second flange (41) is threadedly connected to the threaded sleeve (6).

4. The boiler material return device according to claim 3, characterized in that: A protective sleeve (61) is sleeved on the outer side of the threaded sleeve (6), and the protective sleeve (61) is fixedly mounted on the first flange (11).

5. The boiler material return device according to claim 3, characterized in that: The first flange (11) is provided with a guide hole that is slidably matched with the outer wall of the air inlet bin (4), and the inner wall of the guide hole is provided with a guide portion (111) that extends toward the interior of the return bin (2).

6. The boiler material return device according to claim 3, characterized in that: A concave cavity for accommodating the second flange (41) is provided on the outer side wall of the return bin (2); when the air inlet bin (4) is installed on the return bin (2), the second flange (41) is located inside the concave cavity.

7. The boiler material return device according to claim 1, characterized in that: A material guide plate (12) is installed above the air inlet on one side of the return material bin (2), and the material guide plate (12) is arranged to be inclined from top to bottom toward the inside of the return material bin (2).

8. The boiler material return device according to claim 1, characterized in that: The air inlet bin (4) is connected to an air inlet pipe, the air inlet pipe is located on a side of the air inlet bin (4) away from the wind cap (5), and an elbow (8) is installed at the end of the air inlet pipe. When the air inlet bin (4) is installed on the return bin (2), the port of the elbow (8) is arranged toward the return bin (2).

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